From the case:
Thoracic aortic aneurysm: thrombosed
Frontal

Increased soft tissue density over the aortic knuckle. The outline of the aortic knuckle is still preserved.
From the case:
Thoracic aortic aneurysm: thrombosed
Coronal C+ arterial phase

Confirms thrombosed thoracic aorta aneurysm